Ammonia-saturator.



J. A. ROELOFSEN.

AMMONIA SATURATOR. APPLIUATION FILED Amma, 1910.

969,906, Patented Sept 13, 1910.

Elm/ucm to@ JRoeo/Cn.

Wij y UNrrED STATES PATENT oEEicE.

JAN ADoLi` RoELoESEN, 0E MiDDLESBRoUGH, ENGLAND, ASSIGNoR To THE ACTIEN- GESELLSCHAFT FUER KOHLENDESTILLATION, or DUSSELDORF, GERMANY, A coR- PORTION 0F GERMANY.

AMMONIA-SATURATOR.

Application led April 19,

To all whom'it may concern:

Be it known that I, JAN ADoLr Ronnoi- SEN, a subject of the King of Great Britain, residing at Southcote, Cambridge Road, lVliddlesbrough, in the county of York, England, have invented new and useful Improvements in Ammonia- Saturators, of which the following is a specification.

This invention relates to a saturation vessel for the production of solid salts from gases.

One of the objects of my invention' is to provide a smaller and more economical ap paratus for the recovery of ammonia from gases as a salt, preferably a sulfate, and to recover the residual ammonia remaining in gases of carbonizationafter theyhave passed through a cooler, in the same vessel in which the vapors from the ammonia still are absorbed, and yet without contaminating the gases of carbonization with the noxious gases accompanying the vapors from the ammonia still. This vessel is especially applicable to my method of recovering ammonia from coal gases set forth in my copending application, Serial No. 556,402.

invention will be clearly understood from the following description, in connection with the accompanying drawings showing a vertical section of an apparatus embodying the invention.

`rI he saturator comprises a closed lead or lead-lined vessel 1, having a central depression or pocket 2, in the bottom into which the precipitatedsalts fall, the bottom of the vessel preferably sloping toward the depression. The precipitated salts which accumulate therein may be removed at intervals by means of an injector' or jet pump having a discharge-pipe 5 which extends throughthe vessel and into the pocket 2. The gases of carbonization which have passed through a cooler and preferably through a tar-extractor,vare led into the saturator through a pipe 7 and are freed .from residual ammonia as lthey pass up through the acid solution S, and pass out through the pipe l0. The hot vapors from the ammonia still-\ar e conductedinto the vessel 1, through the perforated end of the pipe 12. The contained ammonia is absorbed by the solution, and the noxious gases pass out of the saturator through the pipe 14. I

vprefer to superheatthe vapors coming from Specification of Letters Patent.

Patented Sept. 13, 1910.

1910. seriai No. 556,401.

the ammonia still before they enter the saturator to prevent condensation of water in the saturator 1, and thereby a lowering of the concentration of the acid solution which would prevent the ammoniumsal-t from separating in the solid state.

In oi'der to prevent any intermingling of the gases of carbonization entering through the pipe 7, with the noxious gases from the ammonia still entering through pi e 12, I provide a diaphragm 16, which dips into the acid solution of ammonium Salts 8, and divides the saturator vessel into two coinpartiiieiits. It is `evident that this diaphragm does not interfere with the settling of the precipitated salts into the pocket 2, and yet eti'ectually prevents the gases of carbonization entering-through pipe 7 fi'om being contaminated by the noxious gases entering through pipe 12. The gases of carbonization led olf through pipe 10 are, therefore, uncontaminated by any of the noxious gases liberated by the decomposition of the fixed ammonium salts by the sulfuric acid in the saturator, or other gases coming from the ammonia still, and consequently may be employed for illuminating purposes or for use in gas engines. At the same time, this arrangement of a single vesselcontaining the acid solution into which both the gas of earbonization and the hot vapors from the ammonia still are led for the purpose of precipitating the solid ammonium salts, results in great economy as well as a siinplifieation of apparatus. The superheated vvapors coming from the ammonia still prevent the condensation of water in the saturator and thereby a lowering of the coiicentration'of tlie acid solution, and the gases of carbonization also entering the same solu,

tion can thus be freed from the residual ammonia.

Having now described my invention and one specific form of apparatus embodying' of solid salts from gasee, piovidied with a In testimony Wheiieof have heiuiito set pocket in the bottom and having a diamy hand vin presence of two subscribing 10 plliragm depedin'g fomdtheduppergvall int'c witnesses.

t e eontaine liqui ivi ing t e vesse vinto two compartments which are united at JAN ADOLF ROELOFSEN' the bottom, and an inlet pipe and an outlet Witnesses:

pipe in each compartment, said inlet pipes OSCAR P. KUBACH,

terminatingbelow the surface of the liquid. O. E. STONE. 

